Commutator.



m. 648,|l8. Patented Apr. 24, I900. H. r. STUBENRAUCH.

COM M UTATOR.

(Application filed Feb. 8, 1900.)

2 Sheets-Sheet I.

(No Model.)

HHIHHIIIIIIIT Patented Apr. 24, IQOUQ H. F. STUBENBAUCH. GOMMUTATOB.

2 Sheets-Sheet 2.

-(No Model.)

tator embodying my invention.

UNITED STATES PATENT Germs.

HERMAN F. STUBENRAUGl-I, OF CHICAGO, ILLINoIs.

COMMUTATOR.

SPECIFICATION forming part of Letters Patent No. 648,118, dated April 24, 1906. Application fi ed February 6, 1900. Serial No. 4,184. (No model.)

To all whom it may concern:

Be it known that I, HERMAN F. STUBEN-.

tain novel features, which Iwill now proceed to describe and will then particularly point out in the claims.

In the accompanying drawings, Figure 1 is an elevation, partly in section, of a commu- Fig. 2 is an end elevation viewed from the inner or lefthand end of Fig. 1, and Fig. 3 isa transverse sectional view taken on the line 3 3 of Fig. 1.

In the said drawings I have shown my invention as embodied in a commutator of what is known as the Brush type, such as is set forth, for instance, in Letters Patent, No. 189,997, of April 24, 1877, and No. 203,412, of May 7,1878, both granted to Charles F. Brush.

In said drawings, 1 indicates the armatureshaft, and 2 a sleeve secured thereon and adapted to receive the several disk-like sections of which the commutator is composed. In the drawings the commutator is shown as composed of six of these disk-like sections arranged in pairs, and as said sections are similar in their generalconstruction. I will describe in detail the construction of one,o:f them, it being of course understood that the same description is equally applicable to all of them. The body portion of each section consists of a disk of slate 3, divided diametrically into two semicircular halves and centrally pierced by an aperture of somewhatgreater diameter than the external diameter of the sleeve 2. The division-line is indicated at 4 in Fig. 3 of the drawings. These halfdisks of slate are united by means of a spider 5, consisting of an annular body portion 6,

from which extend radially outward a plurality of pairs of arms 7, having between them a space within which the inner margin of the half-disks fit closely. The half-disks are held in position between the arms of the spider by means of screws 8, which screws pass loosely through one of each pair of arms and also loosely through the body of the slate,

being threaded into suitable apertures in the other one of each pair of arms. As shown in Fig. 3 of the drawings, each pair of arms is not necessarily provided with the fasteningscrews, and in the particular construction illustrated those arms which overlie the line of junction of the two halves of the disk are without screws and serve merely as alining devices to hold the two halves of the disk in proper relative position. The annular body 6 of the spider is also provided with a boss or projection 9 to receive a set-screw 10, by means of which the spider and disk may be secured upon the sleeve 2.

The commutator segments or plates are secured to the margin of the disk 3 and are indicated as a whole by the reference-numeral ll. As shown, they are constructed in the usual manner of a permanent base 12 and removable segments proper, 13, so as to permit the renewal of the wearing-surface. Each segment is provided with pairs of arms 14., which extend inward radially and receive between them the outer margin of the slate disk 3, which fits snugly between said arms. Screws 15, passing through the pairs of arms and through the body of the disk, serve to connect the segments to the disk in a firm and rigid manner. It will be observed that the dividing-line of the two halves of the slate disk is spanned by a segment in each instance in such manner that each segment has connecting devices between it and the disk, located on each side of said dividingline, so that the segments themselves serve as means for holding the two halves of the disk together.

Each disk-like section of the commutator may be provided with a separate spider; but I prefer to form the spiders of each pair of sections in a single piece by making their annular body portions 6 continuous, as indicatedin Fig. 1 of the drawings, thereby assuring proper relative location of the sections composing each pair. In the construction repair shop.

shown the insulating-segments of the commutator, which are indicated at 16, are made in one piece with the adjacent segment 11 of the adjacent disk-like section, and in this case said insulating-section will be provided with radial inwardly-extending arms 17, corresponding to the arms 1% of the segments 11, embracing and fitting the margin of the disk 8 and connected with said disk by fasteningscrews 18. This construction not only more firmly and accurately unites the two sections of each pair, but also serves to more lirmly hold the two halves of the disk 3 in proper position relatively to each other.

The several slate disks which compose the bodies of the sections of the commutator are apertured for the passage of the wires 19, which connect the several sections with the armature-coils, and these wires are covered with an insulation, which preferably consists of a tubing 20, of hard rubber. Said wires are provided with the usual connecting-sleeves 21 at their exposed ends.

The inner end of the commutator is preferably closed by means of a disk 22, of slate, adapted to lit between the sleeve 2 and the inner edge of the commutatoi segments, being secured in position by screws 23 and serving to present at this point a smooth and readily-cleanable surface, which cannot become charred or burned out by the action of the current. The connecting'sleeves 21 pref erably rest against the outer face of this disk, so that the end of the commutator presents a flush clean hard surface of a noncombustible material, forming a seat for the sleeves 21.

It will be observed that the entire commutater is composed of non-combustible material, which will not char, burn, or deteriorate under the action of the current and which will not absorb the lubricants employed to reduce the friction between the brushes and the contact segments. The material employed for the body of the commutator-sections-to wit, slateserves to effectually insulate the several segments to prevent arcing and is at the same time of great durability and strength. By reason of the division of each disk into separable halves each section of the commutator may be readily disconnected from the whole thereof, and in case of injury any individual section or part of a section can be readily renewed without disturbing or discarding any of the remaining parts and without the necessity of sending the entire commutator to the maker or to a The mode of connecting the slate and metallic portions of each disk-like section is such as to give great strengtl1,wl1ile at the same time facilitating detachability of the parts, and the divided slate disks not only support the segments, but these latter in turn also hold together the parts of the disks.

I prefer to employ slate as the material for sea-11s the body of each section; but it is obvious that the mechanical structural features here inbefore set forth may be employed where divided disks of insulating material other than slate are employed. 1 also prefer to mount the entire commutator as a whole upon a sleeve, such as the sleeve 3, since by this means the several elements of the commutator are united into a unitary whole; but it is obvious that the several disk-like sections might be secured either singly or in pairs directly upon the shaft 1, the sleeve being omitted.

Other modifications than those above indicated may be made without departing from the principle of my invention, and I therefore do not wish to be understood as limiting myself strictly to the precise details hereinbefore described, and shown in the accompanying drawin I claim-- 1. A commutatorcomposedofdisk-like sections, each having a body portion of insulating material, divided to form separable parts, and segments secured to the periphery of said body portions, substantially as described.

2. A commutatorcomposed of disk-like sec tions, each having a body portion of insulab ing material, divided to form separable parts, and segments secured to the periphery of said body portion and uniting the parts thereof, substantially as described.

A commutator composed of dislolike sections, each comprising a disk-shaped body portion of slate or the like, divided into separable parts, a central spider embracing the inner margin of said body portion and serving to unite the parts thereof, and segments embracing and secured to the outer margin of said body portion, substantially as described.

i. A commutator composed of dislidike sections, each comprising a disk-shaped body portion of slate or the like, divided to form separable parts, a central spider embracing the inner margin of said body portion and serving to unite the parts thereof at said inner margin, and segments embracing and sccured to the outer margin of said body portion and uniting the parts thereof at said margin, substantially as described.

A commutator composed of dislelilre seetions, arranged in pairs, each section com prising a disk-shaped body portion of slate or the like, a central spider secured to the inner margin of said body portion and lying between it and the armature-shaft, and seg ments secured to the outer margin of said body portion, the spiders of each pair being integrally united, substantially as described.

0. A comm utatoreomposed of dislclike sections, arranged in pairs, each comprising a disk-shaped body portion of insulating mate-- rial, a central spidersecured to tll6i11ll6l'1i1i11' gin of said body portion, and segments secured to the outer margin of said. bod y porslate body and detachably connected therewith, substantially as described.

8. In a commutator of the class described, the combination, with a central sleeve and disk-like sections mounted thereon, and havin g laterally-overhan gin g peripheral sections, of an end piece of slate or the like adapted to fit between the sleeve and the segments of the terminal section, substantially as described.

HERMAN F. STUBENR-AUCH.

WVitnesses:

IRVINE MILLER, FREDERICK O. GooDWIN. 

